mvc下载文件

MVC下载文件方式
方式一:
public FileStreamResult DownFile(string filePath, string fileName)
  {
         string absoluFilePath = Server.MapPath(System.Configuration.ConfigurationManager.AppSettings["AttachmentPath"] +         filePath);
           return File(new FileStream(absoluFilePath, FileMode.Open), "application/octet-stream", Server.UrlEncode(fileName));
  }
 
 
 
方式二:
 
public ActionResult DownFile(string filePath, string fileName)
  {
  filePath = Server.MapPath(System.Configuration.ConfigurationManager.AppSettings["AttachmentPath"] + filePath);
  FileStream fs = new FileStream(filePath, FileMode.Open);
  byte[] bytes = new byte[(int)fs.Length];
  fs.Read(bytes, 0, bytes.Length);
  fs.Close();
  Response.Charset = "UTF-8";
  Response.ContentEncoding = System.Text.Encoding.GetEncoding("UTF-8");
  Response.ContentType = "application/octet-stream";
Response.AddHeader("Content-Disposition", "attachment; filename=" + Server.UrlEncode(fileName));
  Response.BinaryWrite(bytes);
  Response.Flush();
  Response.End();
  return new EmptyResult();
}

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